Tag: 22 dihydroergocalciferol

While vitamin D4 is a naturally occurring form of vitamin D found in certain mushrooms, there are no documented cases of human toxicity linked specifically to this variant. Unlike the more common D2 and D3, our knowledge of D4's effects and risks in humans remains limited, redirecting health concerns toward over-supplementation of D2 and D3.

According to the National Institutes of Health, the most common supplemental forms of vitamin D are D2 and D3, not D4. Therefore, the question of when to take vitamin D4 is not relevant for most consumers, as it is not readily available as a commercial supplement.

While most people are familiar with vitamins D2 and D3, many are unaware of the existence of vitamin D4. This lesser-known form of vitamin D is found almost exclusively in specific types of mushrooms, but what contains vitamin D4 and how significant is it for human health?

Unlike the well-known vitamins D2 and D3, research indicates that the physiological function of vitamin D4 in humans is largely unknown. A form called 22-dihydroergocalciferol, it is primarily found in certain mushrooms and is not a standard supplement. This leads many to ask: What does vitamin D4 do for you?